Truncated Order Confirmation

I have just started using a great free extension that sends the same confirmation of order email as sent to the customer, to the store owner http://www.opencart.com/index.php?route ... on_id=6371
I have now noticed however that the options detail is truncated to around 40 characters which means that customers (now including me) can't see the full detail of the order in the confirmation.
What amendment do I need to make to include more characters (preferably the full detail) of the option detail
(See image attached)
Thanks
David

You can see the full details in your admin panel. It's just truncated in your email to keep the format nice and not too long and ugly. If you don't want that, if I didn't remember wrongly, you can change it in catalog/model/checkout/order.php

Thanks for your answer. I am more concerned that customers can see the full detail of their order than keeping the format nice. Any idea what I need to change in that file?

find
and change 20 to a greater integer

Hi - thanks again for your further response - much appreciated. I have tried this solution - and although increasing this number does extend the option detail, it also causes the extension which duplicates the customer email to the store owner to fail - it reverts to the original minimal detail email to the store owner. I am attaching the extension in case you can easily see what the problem is.

Your help is much appreciated.